This model involves interested parties forwarding a message to a central email server to initially subscribe to the discussion list. Once subscribed, any messages posted to the list are sent as email messages to all list members. An example of this type of site is WWWEDU (http://edweb.bilkent.edu.tr/wwwedu.faq.htm), a list for the discussion of the role of the WEB in education.

This model consists of a collection of linked Web pages which reside on one server. Subject categories and sub-categories are assigned for specific disciplines, using a menu and su-menu approach. Navigation of the site is done by selecting main categories and sub-categories for greater specificity. The site could also include a search engine to allow users to search for resources on the site by entering keywords.

In this model, the Web pages could all be created by one person, or by individual subject experts. If pages are created by different people, it is preferable to have a template into which information can be entered. This would contribute to greater consistency in the site's appearance and content.

This model consists of a database containing records for each resource, and a Web interface which is searchable with a local search engine. The search results are displayed on a Web page. If the results are descriptions of Web sites, the database can include a live link to the retrieved resource site itself.

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